[Zope] searching and serving large textfiles ~120 Mb

Hi zopistas, I need to access large textfiles (~120Mb) from zope. I know the python lager file support and that it is better to keep large files out of the ZODB. I have to do a full text search on these files residing in a folder hierachy on the server, show their content around the location of the found string and allow scrolling in that files source from zope. Has anybody done something similar to this with that lager files and would share his experiences? Are there any do's and don'ts or best ways to do it? Thanks for your answers, SK